/Engine/Source/Runtime/Datasmith/CADKernel/Public/CADKernel/Topo/TopologicalEdge.h
Extend the Edge to the NewVertex. NewVertex become the new extremity of the edge. The old vertex is unconnected of the edge.
bool ExtendTo ( bool bStartExtremity, const [FPoint2D](API\Runtime\CADKernel\CADKernel\Math\FPoint2D) & NewExtremityCoordinate, [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FTopologicalVertex](API\Runtime\CADKernel\CADKernel\Topo\FTopologicalVertex) > & NewVertex )